Radial car-truck.



PATBNTBDMAR. 31, 1903.

I R. L. ELLERY.

RADIAL GAR TRUCK. APPLICATION FI'LBD JUNE 7, 1902.

B0 MODEL.

3 SHEETS-SHEET 1.

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PATENTED MAR., 31, 1903.

R. L. ELLERY.

RADIAL CAR TRUCK.

APPLIUATION FILED JUNE '1, 1902.

3 SHEETS-SHEET No MODEL.

No. 724,271. l PATENTED MAR. 31, 1903. R. L. ELLERY.

RADIAL CAR TRUCK.

. AP1LI0ATI'0FV FILED .TUHH 7, 1902. l0 MODEL. 3 SHEETS-SHEET 3.,

NITED STATES PATENT OFFICE.

ROBERT L. ELLERY, OE PORTSMOUTH, NEW HAMPSHIRE, ASSIGNORTOy f; SHERBURN M. MERRILL, TRUSTEE, OE BOSTON, MASSACHUSETTS. l

' RADIAL CAR-TRUCK.

SPECIFICATION forming part of Letters Patent N o. 724,271, dated March 31, 1903.A

l Application tiled June '7, 19(12. Serial Nh. 110,606. (No model.)

State of New Hampshire, have invented new and useful Improvements in Radial Car- Trucks, (Case 0,) of which the following is a specification.

This invention relates to railway car trucks, particularly that class of trucks in which three bogie-trucks are operatively connected together to form one truck, each of said bogie-trucks comprising a frame, an axle, and a pair of wheels fast to said axle.

The object of the invention is to provide a car-truck which is so constructed that the axles of said truck will readily adjust themselves to a radial position as the truck and car-body are passing around a curve, thus greatly diminishing the amount of friction between the car-wheels and the track.

The invention consists in a truck, of a center bogie and two end bogies, each of said end bogies pivotally connected to said center bogie at opposite sidesthereof, a bolster supported upon said truck and pivotally connected to each of Said end bogies, and a carbody pivotally supported upon said bolster.

The invention again consists in the instrumentalities hereinbefore setforth in combination with a pair of arms, said arms pivoted to rock horizontally on opposite 'sides of said center bogie, extending across said center bogie and pivotally engaging each other at their outer ends, so that when one ofsaid' end bogies turns upon the point at which it is pivoted to the center bogie-frame the other bogie-frame will be turned to a corresponding extent upon its pivot, and thus bring all three bogies into such position that their axles will be radial to the curve around which the truck is passing.

The invention again consists in the manner of supporting the weight of the car upon the bogie-frames through the bolster and the manner in which the bolster is pivotally connected to the end bogie-frames, whereby all side thrust ofl the car upon the truck is equally divided upon the three bogies.

The invention finally consists in the combination and arrangement of parts set forth in the following specification, and particug larly pointed out in the claims thereof.

Referring to the drawings, Figure 1 is a plan view of my improved radial car-truck,

showing the same as it appears on a straight bogies comprising a truck as it rounds a curve. Fig. 4 is a side elevation of the truck as it rounds a curve as seen in Fig. 3. Fig. 5 is an enlarged detail section on the line 2 2 of Fig. 1, illustrating the manner in which one of the arms is pivotally connected to the center bogie truck-frame. Fig. 6 is a per- Bpecti've view illustrating a portion of one of the end frames and of the center bogie-frame and the manner in which said end bogieframe is pivotally connected to the center bogie-frame. Fig. 7 is a perspective view of a bracket and a portion of the center bogieframe, illustrating a portion of the ball-bearing upon the bracket. Fig. 8 is a perspective view of a portion of one of the end bogieframes andthe bracket which is fast thereto, the 'parts being shown separated for the sake of illustration. Fig. 9 is a perspective view of a portion of one of the arms connecting the two end bogie-frames. Fig. l0 is an enlarged detail section taken on line 10 10 of Fig. 4, illustrating the manner of attaching one-of the equalizing-bars to one of the swiveling blocks.

Like numerals refer to like parts throughout the several views of the drawings.

In the drawings, 15 is the truck as a whole, consisting of three bogie-trucks 1G, 17, and 18, the two trucks 16 and 18 being end bogietrucks and the truck 17 being a center bogietruck. The two end bogie-trucks 16 and 18 are duplicates', although reversed in relative position to each other,`andl each of said end bogies comprises a frame 19, spring-supported upon boxes 20,'said boxes. being journaled upon axles 21 and each of said axles being The center bogie-truck comprises a frame 23,

spring-supported upon boxes 24, journaled upon an axle 25, said axle being fast to wheels 26 26. The center truck-frame 23 has fast to two opposite sides thereof a bracket 27, and to each of the brackets 27 is rigidly fastened a stud 28. Upon one of the studs 28 is pivoted an arm 29, and to the other stud 28 is pivoted an arm 30. These arms extend toward each other and are operatively connected together to swing horizontally upon the vertical pivotal studs 28 28 by means of a sliding block 31 and stud 3.2, said sliding block being arranged to slide in a slot 33, provided in the arm 29 and journaled upon the stud 32, said stud being rigidly fastened tothe arm 30.

Ball-bearings 34 and 35 are provided between the levers 29 and 30 and the brackets 27 in order to facilitate the ease with which the levers 29 and 30 may be rocked upon their pivotal studs 28, as hereinafter described. The levers 29 and 30 are each provided with two horizontal pins 36, extending laterally therefrom and engaging holes 37 37 in ears" l ears 38 38 upon each of the end bogie-frames 19 is rigidly fastened a bracket 39, having a stud 40, rigidly fast to and projecting upwardly therefrom. The upper end of the stud 40 is shouldered down to a smaller diameter than the main bodythereof and projects upwardly into a slot 41, provided in the bolster 42.

The bolster 42 rests at 43 43' upon springs 44 and is' provided with a central cross-bar 45, which engages a king-bolt 46, by means of which the car-body 47 is pivotally connected to said bolster. The springs 44 rest upon spring-boards 48 48, each of said springboards being supported in turn at each side of the truck upon equalizing-bars 49 49. The equalizing-bars 49 are in turn pivotally supported upon swiveling blocks 50 and 51. The swiveling block 50 is supported in such a manner as to swing upon a horizontal bar 52, midway between the two ends thereof. The horizontal bar 52 is pivotally supported upon two links 53 and 54, which are pivoted to and extend downwardly from the end bogie-frame 19. The links 53 and 54 preferably extend inwardly toward the center truck at their lower ends. The swiveling block 5l is supported in such a manner as to swivel upon the center truck-frame 23. The object of supporting the equalizing-bars upon swiveling blocks, as hereinbefore set forth, is that they may adapt themselves to the varying angles assumed by the bogie-frames to each other in rounding a curve.

The general operation of my improved truck is as follows: When in its normal position, the axles 21 and 25 of each of the bogietrucks are parallel to each other; but as the truck rounds a curve, assuming the same to be movingin the direction of the arrow, Figs.

1 and 3, when the flanges of the leading end bogie-truck 18 strike the curve of the track said bogie-truck will be rotated upon its pivotal stud 28, and as the truck moves onto the curve the arm 29, by reason of the changed position of the end truck at the left of Fig. 1, will be moved from the position shown in Fig. 1 to that shown in Fig. 3, moving with it, by means of the block 3l and pin 32, the arm 30 from the position shown in Fig. 1 to that shown in Fig. 3. The arm 30 rocks upon its pivotal stud 2S and moves the end bogietruck 16 from the position shown in Fig. 1 to that shown in Fig. 3, thus bringing the axles of the three bogie-trncks into a position radial with the curve around which the truck is passing.

It will be seen that as the end bogie-trucks 18 and 16 are each connected to the arms 29 and 30,respectively,by horizontal pivotal pins 36 any Variation in height between the end axles and the bogie-frames supported thereon and the center axle and its frame will he compensated for by the end trucks rocking upon the horizontal pivots 36. The distance from each ofthe studs 40 to the axle 21 at each end of the truck is one-third the distance from said studs to the center of the axle 25, and hence any side thrust of the car-body upon the bolster is transferred by said bolster to the studs 40, an equal amount being taken by each of said studs, and on account of the relative distances (hereinbefore set forth) of said studs from the axles 21 and 25 two-thirds of the side thrust upon each of the studs 40 will be communicated to the axle 21 and wheels 22 and one-third of said side thrust upon each of said studs 40 will be transmitted to the central axle 25. It will thus he seen that each of the axles and its wheels receives one-third of the total side thrust imparted by the car-body to the bolster, and thus the strain is equally distributed between the three bogietrucks. i

Having thus described my invention, what I claim, and desire by Letters Patent to secure, is-

1. In a car-truck, a center bogie and two end bogies, and two arms pivoted to rock horizontally on opposite sides of said center bogie and extending toward each other thereacross, said arms pivotally engaging each other at their outer ends, each of said arms pivotally connected to one of said end bogies in such a manner as to rock vertically in relation thereto.

2. In a car-truck, a center bogie and two end bogies, two arms pivoted to rock horizontally on opposite sides of said center bogie land extending toward each other thereacross,

said arms pivotally engaging each other at their outer ends, each of said arms pivotally connected to one of said end bogies in such a manner as to rock vertically in relation thereto, a bolster supported upon said truck and pivotally connected to each of said end bogies,

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and a car-body pivotally supported upon said bolster. Y

3. In a car-truck, a center bogie and two end bogies, a vertical stud fast to each of two opposite sides of said center bogie, two arms, each pivoted upon one of said vertical studs and extending toward each other across said center bogie, said arms pivotally engaging each other at their outer ends, and ahorizontal pivotal pin connecting each of said end bogies to one of said arms.

4. In a car-truck, a center bogie and two end bogies, a vertical stud fast to each of two opposite sides of said center bogie, two arms, each pivoted upon one of said vertical studs and extending toward cach other across said center bogie, said arms pivotally engaging each other at their outer ends, a horizontal pivotal pin connecting each of said end bogies to one of said arms, a bolster supported upon said truck and pivotally connected to each of said end bogies, and acar-body pivotallysupported upon said bolster.

5. In a car-truck, a center bogie and two end bogies, a vertical stud fast to each of two opposite sides of said center bogie, two arms, each pivoted upon one of said vertical studs and extending toward each other across said center bogie, said arms pivotally engaging each other at their outer ends, a horizontal pivotal pin connecting each of said end bogies to one of said'arms,a bolster supported upon said truck, a vertical pin fast to each of said end bogies and projecting into a slot provided in said bolster, and a Vcar-body pivotally supported upon said bolster.

6. 'In a car-truck, a center bogie and two end bogies, each of said end bogies pivotally connected to said center bogie at opposite sides thereof, each of said Vbogies comprising a truck-frame, an axle and a pair of wheels, a pair of links depending from one ofsaid end bogie-frames, a horizontal bar pivotally connected to the lower ends of said pair of links, an equalizing-bar, swiveling blocks pivotally connected to said equalizing-bar, one of said swiveling blocks arranged to swivel upon said center truck-frame, the other upon said horizontal bar, between the lower ends of said 'a truck-frame, an axle and a pair of wheels,

a pair of links depending from each of said end bogie-frames upon opposite sidesthereof, a horizontal bar pivoted to the lower ends of each of said pairs of links, two equalizingbars upon each of two opposite sides of said truck extending lengthwise of and beneath said frames, a swiveling block pivotally connected to each end of said equalizing-bars, one of said swiveling blocks arranged to swivel upon said center truckframe,the other upon said horizontal bar, between the lower ends of one of said pairs of links. S. In a car-truck, a center bogie and two end bogies, each of said end bogies pivotally connected to said center bogie at opposite sides thereof, each of said bogies comprising a truck-fraine, an axle and a pair of Wheels, a pair of links depending from each of said end bogie-frames upon opposite sides thereof, a horizontal bar pivotally connected to the lower ends of each of said pairs of links, two equalizing-bars upon each of two opposite sides of said truck extending lengthwise of and beneath said frames, a swivel-block pivotally connected to each end of said equalizing-bars, one of said swivel-blocks arranged to swivel upon said center truck-frame, the other upon said horizontal bar, midway .between the lower ends of one of said pairs of links, a bolster supported upon said equalizing-bars and pivotally connected to each of said end bogie-frames, and a car-body pivotallysupported upon said bolster.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ROBERT L. ELLERY.

Witnesses:

CHARLES S. GooDING, ANNIE J. DAILEY. 

